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TI-2026-48544 Aliases CVE-2026-69200

node-opcua: Prototype Pollution via internal `fieldsToJson()` implementation (Related to CVE-2024-57086)

Priority MEDIUM 51CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to node-opcua-client 2.145.0, the internal fieldsToJson method in packages/node-opcua-client/source/alarms_and_conditions/client_alarm.ts directly assigns unsanitized field names and allows a __proto__.pollutedKey path to modify Object.prototype. Successful exploitation requires an application to expose attacker-controlled event fields to fieldsToJson and may cause denial of service or application logic corruption. This vulnerability is fixed in 2.145.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00346 28th percentileScored 2026-11-07
Fix Fixed node-opcua (node-opcua): 2.145.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
node-opcuanode-opcuabefore 2.145.02.145.0Patch availableCNA
  • node-opcua Vendornode-opcua Affected before 2.145.0 Fixed in 2.145.0 Patch available CNA

Remediation

  • Fix · CNA node-opcua (node-opcua) Fixed in 2.145.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-69200

References

Other 1

  • TI-2026-84561 Authorization bypass in node-opcua lets anonymous clients write CVSS 3.1CRITICAL 9.1
  • TI-2026-39066 node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS CVSS 3.1HIGH 7.5
  • TI-2026-39065 node-opcua: Missing nonce verification in UserNameIdentityToken authentication CVSS 3.1HIGH 7.7
  • TI-2026-48457 node-opcua: TCP Socket Leak (FIN-WAIT-2) via keepalive reconnection cycle - Resource Exhaustion CVSS 3.1HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences